Arrange the following compounds in the decreasing order of the molar conductivities of their aqueous solutions.
| A | B | C | D |
|---|---|---|---|
| $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{Cl}_2$ | $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$ | $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$ | $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$ |
Match the coordination compounds in Column I having the given type of hybridisation of $\mathrm{M}^{\mathrm{n}+}$ ion and magnetic moment as given in Column II.
| Coordination compounds | Hybridisation & Magnetic nature | ||
|---|---|---|---|
| A. | $\mathrm{Ni}(\mathrm{CO})_4$ | P. | $\mathrm{sp}^3, \quad \mu=5.92 \mathrm{BM}$ |
| B. | $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ | Q. | $\mathrm{sp}^3, \quad \mu=2.84 \mathrm{BM}$ |
| C. | $\left[\mathrm{Ni}(\mathrm{Cl})_4\right]^{2-}$ | R. | $\mathrm{sp}^3, \quad \mu=0$ |
| D. | $\left[\mathrm{MnBr}_4\right]^{2-}$ | S. | $\mathrm{dsp}^2, \quad \mu=0$ |
Which of the following 2 compounds exhibit both Geometrical and Structural isomerism?
$$\begin{aligned} & \mathrm{A}=\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{NO}_2 \\ & \mathrm{~B}=\left[\mathrm{Co}\left(\mathrm{NH}_3\right) \mathrm{Br}\right] \mathrm{SO}_4 \\ & \mathrm{C}=\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right] \\ & \mathrm{D}=\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3 \end{aligned}$$